Valley of the KingsValley of the Kings - During the New Kingdom, the Egyptians designated an area in the desert as the final resting place of their pharaohs.  Building pyramids proved to be too expensive and too labor intensive and practically bankrupted the Old Kingdom.  The is why the pyramids got progressively smaller with each successive pharaoh.  By the New Kingdom, they had given up on building them altogether and opted for a burial site for all their kings.  As a much more modest site, they had also hoped that their pharaohs' tombs would be less of a target for looting.  They were looted anyway.